<!DOCTYPE html>
<html lang="en">

	<head>
		<meta charset="UTF-8">
		<meta name="viewport" content="width=device-width, initial-scale=1.0">
		<title>Document</title>
	</head>

	<body>
		<style>
			* {
				list-style: none;
				margin: 0;
				padding: 0;
			}

			#shop-car li {
				border: 1px dotted red;
				margin: 20px 0;
				padding: 20px;
			}

			.container {
				width: 400px;
				padding: 20px;
			}
		</style>

		<div class="container">
			<input type="checkbox" id="isAllCheck" /> 全选


			<ul id="shop-car">
				<!-- <li>
                <input type="checkbox" />
                <div>商品名称:</div>
                <img src="https://img12.360buyimg.com/n0/s80x80_jfs/t1/118064/27/12885/59959/5f17b7efE453f688d/5b33ac76b2aaea9b.jpg" alt="">
                <div>商品价格:50</div>
                <div>购买数量:30</div>
                <div>商品规格: 黑</div>
                <div>是否选中：选中吧OR不选中</div>
            </li> -->
			</ul>
			<p id="totalnum">总数量：xxx</p>
			<p id="totalprice">总价格：xxx</p>
		</div>


		<script type="text/javascript">
			// 数据
			let products = [{
					goods_name: '小米10-1',
					goods_img: 'https://img12.360buyimg.com/n0/s80x80_jfs/t1/118064/27/12885/59959/5f17b7efE453f688d/5b33ac76b2aaea9b.jpg',
					goods_price: '500',
					goods_attr: '砂石黑4GB+64GB',
					goods_num: 10,
					goods_is_checked: true
				},
				{
					goods_name: '小米10-2',
					goods_img: 'https://img12.360buyimg.com/n0/s80x80_jfs/t1/118064/27/12885/59959/5f17b7efE453f688d/5b33ac76b2aaea9b.jpg',
					goods_price: '510',
					goods_attr: '砂石黑4GB+64GB',
					goods_num: 50,
					goods_is_checked: false
				}
			];


			// 获取元素
			let shopCar = document.querySelector("#shop-car");
			
			
			// 定义变量
			let totalNum = 0;
			let totalPrice = 0;
			

			// 定义空字符串
			let str = '';
			// 数据绑定
			products.forEach(val => {
				str += `<li>
                <input type="checkbox" ${val.goods_is_checked?'checked':''} />
                <div>商品名称:${val.goods_name}</div>
                <img src="${val.goods_img}" alt="">
                <div>商品价格:${val.goods_price}</div>
                <div>购买数量:${val.goods_num}</div>
                <div>商品规格: ${val.goods_attr}</div>
                <div>是否选中：${val.goods_is_checked?'选中':'不选中'}</div>
            </li>`;
				
				// 累加操作(选中)
				if(val.goods_is_checked){
					// 累加数量
					totalNum += val.goods_num;
					
					// 累加总价格 （单价*数量）
					totalPrice += val.goods_num * val.goods_price;
				}
				
			
			});

			// 赋值操作
			shopCar.innerHTML = str;


			// 全选
			// 获取元素
			let isAllCheck = document.querySelector("#isAllCheck");
			let isAllChecked = products.every(val => val.goods_is_checked == true);

			// 判断
			if (isAllChecked) {
				isAllCheck.checked = true;
			} else {
				isAllCheck.checked = false;
			}
			
			
			
			// 赋值总价 和 总数量
			let num = document.querySelector("#totalnum");
			let price = document.querySelector("#totalprice");
			
			num.innerHTML = '总数量:'+totalNum;
			price.innerHTML ='总价格'+totalPrice;
			
		</script>
	</body>

</html>
